Oil-well pump



(No Model.)

W. J. WRIGHT OIL WELL PUMP.

Patented May 17,1898

/N VEN 70H www .IW-ryu'- A Tron/v5 ys UNITED STATES PATENT OFFICE.

WILLIAM JAMES WRIGHT, OFPITTSBURG, PENNSYLVANIA.

olL-wi-:LL PUMP.

SPECIFICATION forming part of LetterslPatent No. 604,202, dated May 17, 1898. Y Application filed .Tune 11, 1897. vSerial No. 640,3 74. (No model.) i

To a/ZZ whom t may concern:

Be it known that I, WILLIAM J AMES WRIGHT, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and Improved Oil-Well Pump, of which the following is a specification.

This invention has primarily for its object to provide a pump mechanism of a very simple and economical construction, which can be easily manipulated and which will effectively serve for its intended purposes.

This invention also seeks to provide a pump of this kind having a single set of cups or packing member on the feed-pipe, a working barrel and the valve devices so arranged that the oil will be drawn in at a .point between the upper end of the feed-pipe and discharge, as it is compressed between such end and the upper end of the working barrel.

With other objects in view, which will hereinafter be referred to, the invention consists in the peculiar combination and novel ar# rangement of parts, such as will be iirst de-A scribed in detail and Vthen be specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure 1 is a vertical section of a pump constructed in accordance with my invention.' Fig. 2 is an enlarged section of a portion thereof, illustrating more clearly the inlet and outlet valve devices of the standing tube and working barrel. Fig. 3 is a detail section of the lock-cage portion of the pump. Fig. 4 is a horizontal section on the line-4 4 of Fig. 2. Figs. 5 and 6 are similar views taken on the lines 5 5 and 6 6 of Fig. 3. Fig. '7 is a detail view illustrating one ofthe removable bear-i ings for the lift-tube. y

Referring to the accompanying drawings, l indicates the well, and 2 an outer tube or jacket, the lower end of which has an internal thread 2il to receive the threaded plug or bushing 4, which has a central threaded aperture 5, into the upper end of which is secured the lower end of the standing tube 6, which ex# tends up a desired distance and carries at its upper end a single series of cups 7 Vand ai valve-cage 8, in which is held an upwardly-I; opening valve 9. Nhile I have shown the upper end of the standing tube provided with cups, it is manifest the same may be provided with a single piston or packing annulus to engage the inner face of the working barrel l0. The working barrel l0 has at its lower end a centrally-apertured nut ll, which rides upon and guides the barrel at thelower end on the tube 6. The upper end of theworking'barrel has a closed cage l2, which terminates in an apertured discharge portionl, having a female thread to receive the threaded lower end of the lift-tube l4.

l15` indicates a valve held in the closed cage and adapted `to close off the working-barrel outlet.

The lower end of the outer tube 2 has also an exterior thread 2b to receive the upper threaded end 1G of a cage 17, the bottom of which is apertured at 17a for the passage of the perforated anchor-tube 18, which has an enlarged head 18a, the purpose of which will presently appear. Y

To provide a suitable means for holding the outer tube 2 locked in engagement with the sides of the well, the cage is provided with a series of toothed dogs 19, pivoted to the cage and adapted to normally swing to an inoperative position.

The tube 2 has a series of apertures 2cl at or near the lower end, while the upper end has a removable cap 20, in which the lift-tube plays and is guided.

To facilitate the ready attaching of the standing tube to the bushing 4, the lower end of the tube 2 is in the nature of a nipple, which is joined to the main body of the tube by a union-collar 2l, as shown.

To guide the lift-tube 14 and steady the same as it is moved, one or more supplemental bearing-blocks 2l are provided, which are of approximately the diameter of the well and have laterally-extending Inembers,which may lbe inthe nature of springs 23, which engage the sides of the well and are held in place by friction. To provide for setting such blocks at a proper point within the well and to admit of a free movement of the lift-tube without dislodging the blocks, the said tube is pro- 'vided with a collar 24 for each block, so disposed thereon that the said blockswill be carried to a point just below the limit ofthe downstroke of the lift-tube.

` So far as described it will be clearly seen that when the working barrel is drawn up IOO is adapted to extend down into the shot portion or well-cavity, whereby to feed the oil to the standing tube proper. When this supplemental tube is employed, it will be understood the lock-cage is made secure at some point in the well above the shot portion.

From the foregoing description, taken in connection with the drawings, the complete operation and advantages of my invention will be readily understood.

It will be observed that by providing a standing tube with but a single set of cups or packing at the top the working barrel will have but one bearing or wear surface, and as the oil is drawn up through the tube which passes through the cups and the cups held from a plunging action through the oil such cups will not be quickly worn, as sand and grit are held from passing up between them. Furthermore, by providing the lower end of the tubing with escape-orifices it is manifest that when the oil-level gets below such oriiices the oil accumulated within the tubing and lower part of working barrel will draw od, and thereby prevent a churning action of oil within the pump and avoid a quick wear of the several parts.

By providing a wedging means of the charter described the tubing can be held secure within the well by allowing the tubing, with the cage, to drop on the anchor-tube, the collar of such tube serving to engage the pivoted dogs and force them out to engage the wellwalls. v

When it is desired to lift the pump from the well, the lift-rod is elevated sufficient to bring the nut on the lower end of the working barrel to engage the nut 26 on the standing tube, which being connected to the outer tubing 2 will raise the said tubing 2 and wedge-cage and release the dogs from engagement with the well.

While the nut at the lower end of the working barrel is preferably used to raise the outer tubing, l desire it understood that in practice the cap on the top of the casing and the top of the valve-cage on the working barrel may be arranged that the top of the said cage will engage the cap and lift the tubing. When the lift-tube raises the working barrel, the supplemental bearing-blocks will be raised thereby.

In wells where the lock-cage can be secured at a pointwithin or near the oil-body the supplemental tube 25 need not be used, the same being only employed in shot wells in which the oil-pocket is at a considerable distance below the point where the lock-cage is secured, it being understood that in the latter arrangement the anchor-tube extends to a point below the pocket.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, is-

l. An improved oil-well pump, comprising a standing valved feed-tube, a working barrel operating over such tube, having an upwardly-opening valve and a lift-tube, and an outer tube-section having anchoring means, said tube being connected with the standing feed-tube and forming the lower support therefor, and having a guide-support at the upper end on the lift-tube, all being arranged substantially as shown and for the purposes described.

2. An oil-well pump comprising an outer tube, an anchor-tube connected to the lowerY end thereof,said outer tube having dischargeopenings near the lower end, a standing feedtube secured at the lower end to the outer tube and having its upper end provided with an outwardly-opening valve and extended up into the outer tube, packing-cups secured to the said upper end, a working barrel having a guide on the standing tube and provided at its upper end with a valved outlet and a lifttube connected to such outlet as specified.

3. An oil-well pump, comprising a standing feedtube having a suitable upwardly-opening valve, a working barrel operating over such feed-tube, having a tubular lift-tube, and an outer tube incasing the working barrel and standing feed-tube, having a feedopening at the lower end communicating with the feed-tube, and an aperture at the top for the passage of the lift-tube, and provided with discharge-openings, and means for securing it to the sides of the well, as set forth.

4. An oil-well pump, comprising an outer tube, a cage secured to the lower end thereof having wedge-dogs, the anchor-tube projected into the cage and having a head portion to engage and force such dogs outward, a standing feed-tube secured to the outer tube having an outwardly-opening valve at the upper end and a packing surrounding such end, a working barrel, having a lift member ll at the lower end; a valved discharge at the upper end and a lift-tube connected to such discharge end as specified.

5. As an 'improvement in oil-well pumps, the combination with the outer tube having a closed lower end and a detachable centrallyapertured cap 20, at the top, a standing feed-tube extended through the bottom of the outer tube, having packing-cups, and a valve above the cups, a workin g barrel, a closed cage 12, detachably connected to such barrel, a valve, said cage having an upwardly-opening valve, a lift-tube connected to the said cage, and anchor means secured to the outer tubing, all being arranged substantially as shown and described.

IIO

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point below the valve, a Working barrel hav 1o ing a valved outlet at the upper end, and the lift-tube guided in the Cap of the outer tube, all being arranged substantially as shown and for the purposes described.

WM. JAMES WRIGHT.

Witnesses:

JOHN L. FLETCHER, FEED G. DIETERICH. 

